How to change font khmer in Window 7 or Window 10?

If we want to change font khmer in Window 7 or Window 10 .We need to change in Regedit by run (regedit).

regedit-->HKEY_LOCAL_MACHINE-->Software-->Microsoft-->Window NT-->Currentversion

-->Font

After We need to change Khmer UI (True type) and Khmer UI bold(True Type) to KhmerOSsys.ttf 

After that we need to restart the PC.